Computer PC Cooling Radiator System 4 Channel 3 pin 4 pin Cooler Fan RPM Speed Controller w/ PCI Slot Rear Bracket for fan 12 v - power by molex 4pin

4 Channels individual fan speed controller w/PCI slot bracket Each fan can be turned off, speed adjusted range 0%~100% full speed Support 3pin and 4pin fan speed controller by voltage adjusted